Threshing Device

A threshing apparatus comprising:

• a threshing unit configured to thresh a harvested crop;
• a first sorting unit that is arranged below the threshing unit, comprises a first sieve case, and is configured to perform sorting processing on a processed material from the threshing unit;
• a second sorting unit that is arranged below the first sorting unit, comprises a second sieve case, and is configured to perform sorting processing on a processed material from the first sorting unit;
• a grain fan that is arranged below a front end of the threshing unit and is configured to supply sorting wind;
• and
• a first air passage configured to guide sorting wind from the grain fan to a space between the first sorting unit and the second sorting unit.

A threshing apparatus comprising:

• a threshing unit configured to thresh a harvested crop;
• a first sorting unit that is disposed below the threshing unit, is supported so as to be reciprocally drivable along a front-rear direction, and is configured to perform sorting on a processed material from the threshing unit;
• a second sorting unit that is disposed below the first sorting unit, is supported so as to be reciprocally drivable along the front-rear direction, and is configured to perform sorting on a processed material from the first sorting unit;
• and
• a first drive mechanism and a second drive mechanism that are configured to separately drive the first sorting unit and the second sorting unit to reciprocate.

A threshing apparatus comprising:

• a threshing unit configured to thresh a harvested crop;
• a sorting unit that comprises a chaff sieve in which many chaff lips extending along a left-right direction are arranged side by side along a front-rear direction, is arranged below the threshing unit, and is configured to perform sorting on a processed material from the threshing unit;
• a gap changing portion configured to operate the chaff lips toward an open state such that the size of a gap between adjacent chaff lips increases, and toward a closed state such that the size of the gap decreases;
• a coil spring configured to bias the gap changing portion toward one state out of the open state and the closed state by extending from a compressed state relative to a free length of the coil spring;
• and
• an actuator and a wire that is connected to and extends between the actuator and the gap changing portion,
• wherein due to the wire being pulled toward the actuator by the actuator, the gap changing portion is operated toward an other state out of the open state and the closed state in resistance against the coil spring.